New yellow lake.



UNITED STATES PATENT OFFIGE.

' ERNST MECKBACH, OF VOHWINKEL, NEAR ELBERFELD, GERMANY. AS SIGNOR TO FARBENFABRIKEN VORM. FRIEDR. BAYER & C0,. 01 ELBERFELD, GERMANYJA CORPORATION or G RMANY.

NEW YELLOW LAKE.

No Drawing.

To all whom it may concern:

Be it known that I, ERNST )IECKBACII, doctor ofphilosophy; chemist, citizen of the German Empire, residing at Volnvinkel, near Elberfeld, Germany, have invented new and useful Iin rovements in New Yellow Lakes, of which die followingis a specification.

I have found'that 1.5'-dibenzoyldiamiuoauthraquinone (when "amt with suhstrata such for instance as alumina, china clay and blanc fixe) yieldsvaluahle pigments or takes,

which have a Valuable yellow shade and are.

fast to light, oil, alcohol, water and resist the action of chemicals such as chlorin or nitric acid. t

In order toillustrate the new process more [fully the following examples are given, the

.thraquinone are dissolved n 100 kilos of 1 l Specification of Letters Patent. Patented Sept. 13, 1910. Application filed May 17. 1910. Serial No. 561.887. i

tated by blowing air and C into the mixture. in the usual way.

Example 3: parts of LS-dihenzoyldiaminoanthraquinoue are ground together with 90 parts of heavy spar with thegmddr tion of water.

Any other method for producing pig ments or lakes can he used.

I claim:

The new yellow color lake prepared- Pom the symmetrical 1.5-dibenzoyldiaminoanthraquinoue, saidlake heing distinguished hl its valuahle yellow shade and its fastness to light, water and oil, substantially as de-; scribed.

Intestimouy whereof I have hereunto set my hand in the presence of two subscribing witnesses. v

ERNST MEQKBACH. e l-,

Witnesses:

O'rro Komo, CHAS. J, Wmun'r.

The lake is thenfurther treated 

